2022-10-27 16:31:25 +00:00
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The following configuration allows to overwrite the global default interface link settings.
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2022-03-30 23:47:00 +02:00
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.. code-block:: json
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{ "interfaces": {} }
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.. list-table::
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:widths: 25 50 25
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:header-rows: 1
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* - Attribute
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- Description
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- Default
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* - `io-mode`
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- IO mode
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- packet_mmap_raw
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* - `io-slots`
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- IO slots (ring size)
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2022-04-19 10:51:08 +02:00
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- 4096
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2022-10-25 09:56:36 +00:00
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* - `qdisc-bypass`
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- Bypass the kernel's qdisc layer
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- true
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* - `tx-interval`
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- TX polling interval in milliseconds
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- 1.0
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* - `rx-interval`
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- RX polling interval in milliseconds
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- 1.0
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* - `tx-threads`
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- Number of TX threads per interface link
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- 0 (main thread)
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* - `rx-threads`
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- Number of RX threads per interface link
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- 0 (main thread)
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2022-03-30 23:47:00 +02:00
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* - `capture-include-streams`
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2022-10-27 16:31:25 +00:00
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- Include traffic streams in the capture
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2022-11-08 21:42:47 +00:00
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- false
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2022-04-14 09:41:32 +02:00
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* - `mac-modifier`
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- Third byte of access session MAC address (0-255)
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2022-10-25 09:56:36 +00:00
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- 0
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2022-10-27 16:31:25 +00:00
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The supported IO modes are listed with ``bngblaster -v`` but except
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``packet_mmap_raw`` all other modes are currently considered experimental. In
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the default mode (``packet_mmap_raw``) all packets are received in a Packet MMAP
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ring buffer and sent directly through RAW packet sockets.
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The default ``tx-interval`` and ``rx-interval`` of ``1.0`` (1ms) allows precise timestamps
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and high throughput. Those values can be further increased (e.g. ``0.1``) for higher throughput
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or decreased (e.g. ``5.0``) for lower system load.
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It might be also needed to increase the ``io-slots`` from the default value of ``4096`` to
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reach the desired throughput. The actual meaning of IO slots depends on the selected IO mode.
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For Packet MMAP, it defines the maximum number of packets in the ring buffer.
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